Merge pull request #31 from neeleshkumar-mannur/patch-4

Added Java code for Chapter 4

code/Structured_APIs_Chapter_4_Structured_API_Overview.java

@@ -0,0 +1,24 @@
+This Java code was contributed by @neeleshkumar-mannur
+
+import org.apache.spark.sql.Dataset;
+import org.apache.spark.sql.Row;
+import org.apache.spark.sql.SparkSession;
+
+public class Structured_APIs_Chapter_4_Structured_API_Overview {
+	public static void main(String[] args) {
+		SparkSession spark = SparkSession
+				.builder()
+				.master("local[*]")
+				.appName("Chapter4StructuredAPIOverview")
+				.getOrCreate();
+
+		Dataset<Row> df = spark.range(500).toDF("number");
+		df.select(df.col("number").plus(10)).show();
+
+		Object [] dataObjects = (Object[])spark.range(2).toDF().collect();
+		for(Object object: dataObjects) {
+			System.out.println(object.toString());
+		}
+
+	}
+}